Millions of homeowners are opening their county assessment notices this spring, and the numbers inside are not what they expected.
After two years of cooling home sales, many assumed their property values—and tax bills—would finally level off.
In a lot of markets, the opposite is happening.
Assessors typically lag the market by one to three years, meaning this year's notices often reflect the red-hot prices of 2022 and 2023, not today's softer conditions.
Counties in Texas, Florida, Georgia, and parts of the Midwest have posted double-digit assessment jumps, even as buyers in those same areas are seeing fewer bidding wars and longer days on market.
Here's the part that catches people off guard: you can fight it.
Roughly 30 to 60 percent of homeowners who formally appeal their assessment win some kind of reduction, according to data compiled by tax review firms.
The national appeal rate hovers around 5 percent, largely because the process feels intimidating and the deadlines are easy to miss.
The window to act is tight in most states—often just 30 to 90 days from the date on your notice.
Miss it and you're locked in for the year, no exceptions.
The first move is simple: find your notice, note the deadline, and check whether your assessed value is above what similar homes nearby actually sold for.
Gather three to five comparable sales from the past 12 months, ideally in your immediate neighborhood and similar in size, age, and condition.
Zillow estimates won't cut it in a hearing—pull actual recorded sale prices from your county's public records or a real estate agent's MLS data.
If your home is assessed at $420,000 and comparable homes are selling for $380,000, you have a case.
Errors are also common and worth checking.
Assessors sometimes have the wrong square footage, an extra bathroom that doesn't exist, or a finished basement listed on a home that has none.
A quick review of your property's public record card can reveal mistakes that add thousands to your assessed value.
Filing an appeal is usually free or costs a small fee, and many counties now accept submissions online.
You can represent yourself—no lawyer required—and hearings typically last under 15 minutes.
If the board agrees, the reduction applies going forward, which can save hundreds or even thousands of dollars annually.
One caution: don't assume a lower assessment automatically means a lower bill.
If your local government raises the tax rate to cover budget shortfalls, your payment could stay flat or even climb.
The assessment sets your share of the pie, but the rate determines how big the pie is.
A successful appeal is not guaranteed, and outcomes vary widely by county and by the strength of your evidence.
But with home values up sharply since 2020, the odds that an assessor overshot are better than many owners realize.
Our take: this is one of the few household money tasks where an hour of paperwork can pay off for years, and most people skip it out of pure inertia.
Check your notice, check the deadline, and check your neighbors' sale prices before you file anything.
Final Thoughts
The system rewards the homeowners who show up.